Originally Posted by Grimace
This is something I've been wondering about - are recrystallizations really supposed to be restricted to the chemistry forum? I mean it's not creating a drug
, it's just cleaning one that's already made. After all, the Cocaine
forum has LeJunk's marvelous cocaine cleaning technique. What's the difference?
That is a very good question,
We'll start with the Cocaine and Crack forum
, the use of the term "recrystallization" is being wrongly use to describe the neutralization reaction of an acid and a base wherein the cocaine anions (negatively charged ions) are put with hydrogen chloride cations (positively charged ions) resulting in a cancellation of net charge creating the reaction salt product cocaine HCl.
There is some of what could be loosely termed Single-solvent recrystallization but it's more a solvent wash then a true use of separation via a thermal gradient or pressure deferential in a saturated solution. There is no seeding or an initiation step synonymous with single-solvent recrystallization such as scratching the side of the container to make a site on which crystals may grow.
This common language use of the chemistry term recrystallization is not a problem because it's what the word represents that matters, as long as it's connected with a procedure for purifying of what ever compound there is no conflict.
Now to the Meth Chemistry forum
Any time a drug creation involves covalence or in anyway the manipulation of a reactant to form a new product this is called synthesis. In this case Methamphetamine
, it will require a certain set of properties as a finished product for the end user, such as IV use, smoking or snorting
lines. Getting from a table full of precursor chemicals to this finished product is called the total synthesis.
After the Meth
is made it's turned into a HCl salt just like in way described above but in this form it will not have the desired properties of smoking or snorting so a Multi-solvent or mass saturation recrystallization is preformed to make what is known as crystal meth. This final phase recrystallization is an integral part of creating the new substance and it's desired properties.
So you see with the meth the recrystallization is not just a procedure for purifying a compound it's a part of total synthesis, therefore it could only be discussed in the chemistry section.